Polymers, specifically metallopolymers, continue to find applications in fields ranging from sustainable catalysis, energy storage, to medical applications. Polymers with coordinating ligands are a promising class of materials, since nitrogen and oxygen ligands impart tunability to the polymers, which leads to new and interesting material and chemical properties. In this presentation, we will describe the synthesis and characterization of thermoplastic polyadipate and polysuccinate chain extended with polypiperazine polyurethane linkages. We incorporated the piperazine functionality as both a pH-sensitive and metal coordinating functionality to the final materials. NMR (1 dimension and 2 dimension), gel permeation chromatography, Infrared and Raman spectroscopy in solution or as thermocast coatings at selected acidities and metal concentrations characterized the polymers. The polymers were then metallated with between 5-10% (w/w) Fe(III) acetylacetonate in ethanol under a nitrogen atmosphere. Each polymer and Fe(III) metallopolymer were characterized using thermal gravimetric analysis and differential scanning calorimetry and electrochemically as thermocast coatings.

Synthesis and Characterization of pH-Sensitive Polyester Polypiperazine Polyurethane Metallopolymers

ACS Spring 2022

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